With all the best intentions, codebases frequently end up a tangled web of components, abstractions, and global state (managed by some third party library) making the smallest of changes a living nightmare, and maintenance a balancing act.
Collection of professionally designed state machines you can drop into your projects.
Every line of code written comes at a price: maintenance. To avoid paying for a lot of code, we build reusable software. The problem with code re-use is that it gets in the way of changing your mind later on.
The placeholder attribute contains a surprising amount of issues that prevent it from delivering on what it promises.